Because of the fact that the other layers are covered in fondant, I going to guess that the silver layer is covered in fondant also. Then probably sprayed silver with an air gun and then the Wilton Silver sugar sprinkles (which are nice and coarse) pressed on very thickly. If you press them into white buttercream, you will see the white through small gaps. It won't look like the middle layer of this cake.
2/16/14 at 8:29pm